Organización de comunidades estacionales de malezas en el sudeste de la Provincia de Buenos Aires

Authors

  • Eduardo Requesens Facultad de Agronomía, Universidad Nacional del Centro de la Provincia de Buenos Aires. Casilla de Correo 178, 7300 Azul, Argentina
  • Nora Madanes Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Intendente Güiraldes y Costanera Norte, 1428 Buenos Aires, Argentina

Abstract

Patterns of aerial biomass accumulation, distribution of relative abundance and species diversity were analized during the development of two seasonal communities of weeds in SE of the province of Buenos Aires (Argentina). One community corresponded to a winter crop cycle (from the begining of August to mid January) and the other to summer crop cycle (from early October to the end of March). The analysis showed two different models of community organization. During its development, the winter community showed lower biomass accumulation, greater species diversity, and a sequence of dominance by different species as the growing season procedes. The summercommunity showed twice as mach biomass, lower species diversity, and a stationary hierarchy of codominant species. In both communities, the distribution of relative importances was linear over the entire growing period, but the slopes for the summer community were more negative.

References

Alonso, S.1. 1984. Período de emergencia de las principales malezas del sudeste bonaerense. INTA-Estación Experimental Agropecuaria Balcarce, Informe para Extensión, Producción Vegetal, Vol. 2, 4 pp.

Black. C.C. 1971. Ecological implications of dividing plants into groups with distinct photosynthetic production capacities. Advances in Ecological Research 7:87-109.

Black, C.C., T.M. Chen and R.H. Brown. 1969. Biochemical basis for plant competition. Weed Science 17:338- 344.

Fernández, O.N. y C.A. Verona. 1983. Crecimiento y partición de materia seca en Senecio madagascariensis Poiret (Compositae). Revista Facultad de Agronomía 4:312-325.

Marzocca, A. 1976. Manual de malezas. 3a edición. Editorial Hemisferio Sur, Buenos Aires. 564 pp.

McNaughton, S.J. y L.L. Wolf. 1984. Ecología general. Ediciones Omega S.A., Barcelona. 713 pp.

Oka. H.1. and C. Liu. 1984. The lognormal distribution of species in weed communities. Proceedings of the National Science Council ROC (B) 8:19-25.

Pianka, E.R. 1978. Evolutionary Ecology. Harper and Row, Publishers. 397 pp.

Requesens, E.C., N. Madanes y L. Montes, 1989. Composición florística y dinámica de dos comunidades estacionales de malezas en Balcarce (Argentina). Revista de la Facultad de Agronomía (La Plata) 64: 53-60.

Sala, O., V.A. Deregibus, T. Schlichter and H. Alipe. 1981. Productivity dynamics of a native temperate grassland in Argentine. Journal of Range Management 34:48-51.

Smith, B.N. and W.V. Brown. 1973. The Kranz syndrome in the graminae as indicated by carbon isotopic ratios. American Journal of Botany 60:505-513.

Verona, C.A., O.N. Fernández y C.M. Loffler. 1980. Competencia entre malezas y cultivos. Análisis de la interferencia de las malezas sobre el cultivo de lino oleaginoso. Ecosur, Argentina, 7:19-109.

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Published

1992-12-01

How to Cite

Requesens, E., & Madanes, N. (1992). Organización de comunidades estacionales de malezas en el sudeste de la Provincia de Buenos Aires. Ecología Austral, 2(2), 101–108. Retrieved from https://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/1730

Issue

Vol. 2 No. 2 (1992)

Section

Articles

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